Role of particle morphology in the yielding behavior of dense thermosensitive microgel suspensions

2019 ◽  
Vol 137 (17) ◽  
pp. 48625 ◽  
Author(s):  
Kiran Kaithakkal Jathavedan ◽  
Fayis Kanheerampockil ◽  
Suresh Bhat
Keyword(s):  
Particle Morphology ◽  
Yielding Behavior

scholarly journals Looking for the “Dream Catalyst” for Hydrogen Peroxide Production from Hydrogen and Oxygen

Catalysts ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 251 ◽  
Author(s):  
Federica Menegazzo ◽  
Michela Signoretto ◽  
Elena Ghedini ◽  
Giorgio Strukul
Keyword(s):  
Hydrogen Peroxide ◽  
Heterogeneous Catalysts ◽  
Direct Synthesis ◽  
Particle Morphology ◽  
Synthetic Methods ◽  
Side Reactions ◽  
Catalyst Morphology ◽  
And Performance ◽  
The Ideal

The reaction between hydrogen and oxygen is in principle the simplest method to form hydrogen peroxide, but it is still a “dream process”, thus needing a “dream catalyst”. The aim of this review is to analyze critically the different heterogeneous catalysts used for the direct synthesis of H2O2 trying to determine the features that the ideal or “dream catalyst” should possess. This analysis will refer specifically to the following points: (i) the choice of the metal; (ii) the metal promoters used to improve the activity and/or the selectivity; (iii) the role of different supports and their acidic properties; (iv) the addition of halide promoters to inhibit undesired side reactions; (v) the addition of other promoters; (vi) the effects of particle morphology; and (vii) the effects of different synthetic methods on catalyst morphology and performance.

The role of particle morphology on concrete fracture behaviour: A meso-scale modelling approach

2020 ◽  
Vol 134 ◽  
pp. 106096 ◽  
Author(s):  
Deheng Wei ◽  
Ryan C. Hurley ◽  
Leong Hien Poh ◽  
Daniel Dias-da-Costa ◽  
Yixiang Gan
Keyword(s):  
Fracture Behaviour ◽  
Particle Morphology ◽  
Concrete Fracture ◽  
Scale Modelling ◽  
Meso Scale ◽  
Modelling Approach

Impact of Calcium Phosphate Particle Morphology on Osteoconduction: an In Vivo Study

2007 ◽  
Vol 361-363 ◽  
pp. 1237-1240 ◽  
Author(s):  
Christophe Drouet ◽  
Ronan Barré ◽  
Gérard Brunel ◽  
Gérard Dechambre ◽  
Edmond Benqué ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Chemical Composition ◽  
Calcium Phosphate ◽  
Bone Regeneration ◽  
Particle Morphology ◽  
In Vivo Study ◽  
Total Absence

Apatite/β−TCP particles exhibiting non-conventional urchin-like morphology were prepared by hydrothermal synthesis. Their implantation in the rat calvarium was followed during 60 days. A total absence of osteoconduction was observed despite a favorable chemical composition, stressing the fundamental role of particle morphology on bone regeneration. Results are discussed in relation with other literature data. Possible explanations include the disfavored accumulation of biological mediators due to the acicular shape of the particles and/or a limited accessibility for cells.

Biomimetic Ceramics: What, Why and How?

1991 ◽  
Vol 249 ◽  
Author(s):  
Paul Calvert
Keyword(s):  
Tooth Enamel ◽  
Particle Morphology ◽  
Biological Materials ◽  
Structure And Function ◽  
Natural Materials ◽  
Temperature Resistance ◽  
Materials Engineering ◽  
Synthetic Materials ◽  
And Function

ABSTRACTThe role of biomimetic approaches in materials engineering is reviewed. In the case of ceramics, close parallels in structure and function can be seen between synthetic and biological materials. Biological ceramics have resolved difficulties which are limiting the application of synthetic materials, particularly in the need for greater toughness. The enhanced toughness of materials such as shell and tooth enamel can be attributed to microstructural factors. Both natural materials contain a small amount of polymer. If this is essential, then any synthetic mimetic material would be limited by the temperature resistance of the polymer. In fact, much of the toughness is dependent on the elongated particle morphology and does not require polymer. Routes to forming ceramics with such elongated particles are discussed.

The role of thermal residual stress on the yielding behavior of carbon nanotube–aluminum nanocomposites

2017 ◽  
Vol 14 (2) ◽  
pp. 263-275 ◽  
Author(s):  
Mohammad Kazem Hassanzadeh-Aghdam ◽  
Mohammad Javad Mahmoodi ◽  
Mohammad Reza Kazempour
Keyword(s):  
Residual Stress ◽  
Carbon Nanotube ◽  
Thermal Residual Stress ◽  
Yielding Behavior
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